Spacing device for loom dobby fingers



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UNITED STATES 1,674,010 PATENT OFFICE..

ELBRIDGE n. nourris, or WoRoEsTnn. Massacisnsrrrfrs,` nssreivon ToonoMrToN an KNowL'Es Loom wonxsfor wononsrnr., resserrer-inserirsi, A4coniaonnrron or MASSACHUSETTS.

SPACING DEvIoE roiirooiifnonY rmenns.

Appiirianon fiied AugustY 24, 192s. seriai No. 131,290.

This invention relates to improvements inv loom dobbies and it is theprincipal object l of the invention to provide' a dobby sofconstructedyas to permit the usel of a simplified formoffsheet niet-al `dobloyfinger. y

Dobby fingers must he Speced and kept in alignment with the patternmechanism, this" resulty being 'usually acoinplished y by having theouter ends of the fingers yof reduced thickness to cooperate with theteeth ofthe Separating coinbl It has been proposed heretofore to makedobby fingers of relatively thin sheet steel folded 'together to makethe lbody of the required thickness and having the outer ends formed ofa single thickness to ybe thinner-than the body `to ceoperate with fthecomb.` Should 'a dobby finger of thensiia-l form'be made of a singlepiece of sheet steel a separate operation would be necessary Ato lformthe thinouter end. It is anliinportant object of my present 'inventionto providedobby fingers of relatively thick sheet metal shaped to fit animproved separating comb which `does not,r

require that the finger ends be reduced.`

It Ais amore detailed object of my invention to provide two types offingers, one off which shall be slotted .to receive aseparating pegwhich Will, guide adjacent fingers which are notslotte'd. A v

.In certain picking out operations in a loomfit isdesirable to be. ableto bring all ofthe warp threads to the Same plane, this loonissuch asheretoforeconstructed, a very simple device has been provided forraising all of the dobby fingers, a condition which corresponds tolowering all of the hooks. Asgone or anotherfof the knife bars-.movesoutwardly, therefore, all of the harnesses will he raised, and thisoperation, known as levelling up, can be accomplished very readily'because of the manner in which-the `dobby operates. It is a stillfiirtherobject ofmy invention to form the dobbyfingers,

in addition to the manner already described,`

with aligning lower edgesto cooperatev with the levelling device. e

,Debby fingers usually cooperate with pegs carried. on the patternchainand must `be provided with a runton their under surfaces y 'to supportthe hooks and serve as guidesfor to receivethe peg; It is a furtherobject of my invention to form4 the peg engagingpart of the' fingerswith concave runs somewhat wider than the thickness of the sheetinaterial of which the finger is formed and further to providecertain ofthe fingers with offset portions to engage the other fingers, tothe endthat all ofthe fingers may be properly aligned so that the runs will notinterfere with each other and will be properlylocated with respect tothe pegs ofthe pat-tern chain. V

lVith these and other objects in view which will appear as thedescription'proceeds, iny inverrtion resides inthe combination andarrangement of parts hereinafter described and .set forth in` theclaims.

In the accompanying drawings ywherein I have shown av convenientembodiment of my invention,

l is avertical section through a dobbyhaving my invent-ionappliedthereto,

Fig. 2 is a fragmentary topplan view taken in the direction of arrow- 2,Fig. l, w

Fig. 3 is a vertical sectionon line 3 3 of Fig. 1,

Fig. i is a side elevation of one of the ingers,f preferably one y whichcooperates with the lower hooks,. e V

Fig. 5 is a lview of the other style of dobby finger which cooperateswith" the upper hooks,

F ig'. 6 is a detail operating view Showing thc lingers held in raisedposition by the levelling device,

7 is an enlarged lineT-T of Fig. l, n

Fig. 8 is perspective view of the levelling device, and l 1 Fig. 9 is anenlarged horizontal section on line 9 9 of Fig. 4 i y Referring to thedrawings, it will be seen that I haveV provided a harness jack 2Oypivoted on a fixed pin 2l and having pivotal connection as at 22 with adobby back lever 23. ,The upper end of said lever is pivoted to la hook24 which cooperates with [a horizontally reciprocating knife 25 whilethelower end of said lever is pivotally conhorizontal section on iconectedrwith hook Q6 which cooperates with of knife 25. y Fixed stopbarsk 2S position the lever 23 and other bars 29 may be positioned thelifting wires to be described hereinafter.v

.There will be .several jacks levers, ,dei

pending upon the number of harness frames in the loom.

The pattern mechanism comprises a eylin der 30 movable on a shaft 3l andcooperating with chain bars 32 having pegs 33 to present the latter toindicating position, either each pick ot the loomy it the (lobby be otthe socalled single index type or every second pick o f the loom, it thedobby be double index.

The dotted frame (Z has secured thereto a bar preferably made ot woodand indicated at 34;. held in place by means ot' bolts 35 which passthrough thc bar and also through the. foot 36 ot an open bearing 3T so'formed as to have a substantially semicircular opening 38 which isclosed by the lower outer edge ot bar 34T. It is to be understood thatthe bar l-l extends tor the tull width ot the dobby and that there aretwo open bearings 2li'.

The levelling device L is formed substantially as shown in Fig. 8 withbearing portions $39. one ot which is rei'eived by each of the openings3S. Said lcifelling device is provided with one or more handles tlf) bymeans ot which the same may be turned 'from the position shown in Fig. lto the position shown in Fig. The levelling device shown herein ismerely illustrative and l do not wieh to be limited to the particularform shown.

ln carrying out my present improvements, l provide two distinct types ot(lobby fingers which cooperate with a special form ot comb. The type offinger 50 shown in Fig. has a substantially straight inwardly extendingtail 51 on which rests lifting rod .32. there being one rod tor each otthe upper hooks 2li. The opposite end of finger 5f) is enlarged as at 5Sto add weight is usual with dobby fingers. The type 54 .shown in Fig. 4Ahas an upwardly curved. tail 55 on which rests one o' another of thelower hooks 2G. rlhe opposite end ot said finger :1l is also enlarged asat 5G but said enlargement is turf-her provided with a vertical slot 5Ttor a purpose to be described. The fingers of both types are providedwith support-ing notchesI 58 which receive a rod .59 and there mayturfher bc provided a wire Gt) extending above the rod 59 to preventimproper upward displacement of the fingers.

The bar 34 is provided with relatively short upwardly extending pins G1.so proportioned as to lie within the vertical slots There will be asmany pins 6l as there are fingers 5ft. and by referring to Fig. 7 itwill be seen that fingers 54 alternate with fingers 50, so that a pin orwire 61 will lie between fingers of the type indicated at 50. Thediameter of the. wires G1 may be slightly more than the thickness offingers 5t.

By referring to Fig. l it will be seen that the right hand ends of allthe fingers extend beyond the bar 3ft so as to be operatively positionedwith respect to levelling device L. The under sides of both types may beconcaved to form runs GEZ (see Fig. 3) to receive the pegs 33 ot thepattern mechanism. The rims are toi-mcd by flaring outwardly the loweredges ot the fingers, and in order to prevent these widened portionstrom interfering with each other, and also to properly space the fingersot the type shown in Fig. 4, I 'form the latter as shown in Figs. 7 and9. As set forth more par tieularly in Fig. 9 each finger 5t has a doubleoffset. the first indicated at ffl ex tending slightly to one side ofthe finger while the second ofl'set 04- extends an ctpial amount on theother side of the finger. Said offsets engage the parts .l ot theneighboring fingers 5f) to guide the fingers :7l and to preventinterference ot the adjacent runs (S2.

The pins (il serve. to position the dobby hooks 5f) and the latter inturn position fingers In a double index dobby there will be an evennumber of fingers, one half ot each type, and there will therefore be atinger on one end ot the set with the slot 5T. In order to restrainimproper lateral movement of such finger, the end peg or wire adjacentthe slot 57 of the last finger 54; is made somewhat longer than theothers as indicated at G5 in Fig. (i.

From the foregoing it. will be seen that I have provided dobby fingersthe ends ot which are ot substantially uniform thickness and that theyare made in two types, one ot which is formed to receive the guide forthe other type. lt will also be seen that, all the fingers are sopositioned and formed as to be in operative relatitmship with thelevelling device L. Furthermore. the heavier finger of) will li'f'f thewire .52 as well as one of the hooks. whereas the relatively lighterfinger 5l will be called upon to lif't the hook only. Also. the fingersare `formed with concaved flared runs and one type ofl finger is formedwith ofl'set. parts which serve to position thc fingers of' that type.Furthermore there is a peg ol extra length provided to prevent lateraldisplacement of'A the end finger of' the type .shown in Fig. 11.

Having thus descrilicd my invention it will be apparent that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and .scope of' the invention. and l do notwish to be limited to the details herein dif?- closed but what I claimis:

l. ln a loom (lobby having pattern mechanism and harness actuatingelements, a set ot fingers movable about a common center and operativelypositioned with respect to the pattern mechanism and operativelyconnected to the elements, and guicl lflfl ing members interposedbetween rcertairrof the and located in openings extend` `patternmechanism,` a Llevelling device for the fingers, and guide members forcertain ot the lingers located inopenings extending through other of thefingers and inalignment with said other lingers, all of-said lingersprojecting beyond Vthe guidemembers to be operatively positionedwithrespect to the levelling'device.

In aloom dobby having pattern mechanism and harness actuating elements,a set of dobby fingers, a pivotal support` for all the'tingers adjacentto one end ofthelingers, a levelling device for all"thelingers adjacenttothe other end of said fingers, and guide iinenibers for certain of thefingers located between the pivotal support and levelling device andlocated in openings extending through certain other lingers so that saidguiding members are in substantial alignment with said other fingers,all of said fingers extending beyond the guide members to be operativelypositioned relatively to the levelling device.

4. In a loom dobbyv having pattern mechanism and harness actuatingelements, a set of lingers movable about a common center and for thepattern mechanism opera-tively connected to the elements, and fixedseparating members located between alternate fingers and located inopenings extending through the intervening fingers, the interveilinglingers being projected beyond the separating members so that all ofsaid lin-4 gers are of substantially the same length.

5. In a loom dobby having pattern mechanisni and harness actuatingelements, a set of dobby fingers for the pattern mechanism operativelyconnected to the elements, and spaced guide members received by openingsextending through certain of said members, said fingers formed withopenings for the members also beingextended beyond the members so thatall of said lingers are of substantially the same length,

6. In a loom dobby having pattern mechanism and harness actuatingelement-s, a set of dobbyvfingers for the pattern mechanism operativelyconnected to the elements, spaced guide members received by openingsextending through certain of said lingers, other lingers extendingbeyond and being guided by said members, said fingers `formed withopenings for the members also being extended beyond the members so thatall of said lingers are of substantially the same length, and alevelling deviceftobe moved into engagement with Iall ofthe fingerstolhave operative `Contact with the Ilatter at points betweenthe adjacentends of the lingers and the members. "4'. Inaloom dobby having 4patternmechanism and yharness actuating elements,a` set of dobby fingerstocooperate with the -p'attern` i'nechanism operatively relatedto theelements, `guide members, certain of "the lfingers being formed withIslots in their under sides to receive/the members, `the other fingersbeing guided by the members and-all of saidfingers having'portionsextending above the members, whereby the members will guide said otherlingersand the latter-will guide't-he slottedmembers and all of saidlingers willbe nmt-ually-guided byeach other by reason of the portionsthereof vwhich extend above the members.

8. In a loom dobby having pattern-mechanism, an upperset of hooks, alowerset of hooks, lifting rods forthe upper-set of hooks, and' a set offingers operatively related tothe pattern mechanism, spaced` guidemembers 'to separate the lingers, certain of said fingers having slotsextending therethrough to receive the guide members and having directengagement with the lower set of hooks, the other fingers being betweenthe members and having operative engagement with the lifting `rods forthe upper set of hooks.

9. In a loom dobby having pattern mechanism,an upper set of hooks, alower setof hooks, lifting rods for the upper set of hooks, and a set offingers operatively related to the pattern mechanism, spaced guidemembers to separate the fingers, certain of said fingers having slotsextending therethrough to re# ceive the guide members and having directguided by and extendingl engagement with the lower set of hooks, the

other fingers being guided by the members and having operativeengagement with the lifting rods for the upper set of hooks, and apivotal support for all said lingers located between the patternmechanism and thatportion of t-he fingers which moves to raise thehooks.

l0. A dobby linger for a loom dobby having a separating comb and havingtwo dobby fingers spaced by the comb and restrained against lateralmovement by the comb, said linger to lie between the said two fingersand having an opening extending therethrough to receive that part of thecomb which spaces said lingers and having another portion thereof offsetto engage and be guided by one of said two lingers.

l1. A dobby finger for a loom dobby having a separating comb and havingtwo dobby fingers spaced by the comb and restrained against lateralmovement by the therethrough to receive that part of the eomb whichspaces said fingers and having another poition thereof oflset on bothsides ot said (lobby finger to engage :intl be guided by saii'l twofingers.

12. A (lobby finger for a loom (lobby having a separating comb antl apattern mechanism, said finger having a run on the bottom eflge thereoffor the pattern mechanism :formed by flaring a portion ofi the 4loweredges of the finger, other parts ot' the linger being removed to receivea part ot the eomb and still other portions of the finger being offsetout of the plane of the finger to Qooperate with adjacent fingers an(lacti as a guide.

13. In a loom (lobby, a set of (lobby fingere: eertain fingers havingsubstantially plano vertical walls and certain other fingers havingotl'set portions projecting beyond the surfaces thereof"l to engage theplane surt'aees ot the firsty namerl fingers to space the fingers.

let. In a loom (lobby, a set ot (lobby fingers certain fingers havingsubstantially plane vertical Walls antl Certain other fingers havingoffset portions projecting beyond the surfaces thereof to engage theplane surfaces of the first namerl fingers to space the fingers. and apeg run on the uiuler side of each of the fingers formed by having aportion ol" the lower erlge ot the fingers exteinl laterally beyond theplane vertical surfaces of the fingers.

15. In a loom (lobby7 a set of.2 (lobby fingers, a separating eombhaving a plurality of spaced separating members for the fingers7alternate fingers having portions thereof removed to receive thoseparating members` of the eomb and the intermediate fingers havingportions thereof to engage the members, said fingers being arrangeil inpairs so that; the eu(l finger at one side of the sett is provi(le(lwith an opening. anrl an additional member forming a part ot the comb to(-ngage and restrain lateral movement off the said eu(l finger.

In testimony whereof I have hereunto afiixetl my signature.

ILBRIDGE R. HOLMES.

